2000°F HEAVY DUTY ELECTRIC AND GAS HEAT TREATING FURNACES
Grieve standard 2000°F Heat Treating furnaces are used for a variety of heat treating applications such as tempering, hardening, sintering or firing, including those requiring inert atmospheres. Precision microprocessor based temperature controls and energy-saving insulation maximize the performance of these rugged units. Twelve standard models from 3.9 to 96 cubic feet, built for long, hard, continuous use.
Standard Box Furnaces
from Grieve meet the requirements of National Fire Protection Association
Standard 86, Industrial Risk Insurers, Factory Mutual and OSHA standards.
For some applications, such as those involving special atmospheres or hazardous
locations, the above organizations require additional safety devices.
Controls
—Digital, microprocessor based, thermocouple actuated, indicating temperature
controller
—Modulating burner on gas furnaces
—Motor control push buttons and on-off heat switch
—Easy-to-see pilot light
Safety Equipment
— Electric Furnace
—Adjustable, thermocouple actuated, manual reset excess temperature controller
—Separate heating element control contactors
—Door interlock switch turns off power to heating elements when door
is opened; restores power when door is closed
Safety Equipment
— Gas Furnace
—Adjustable, thermocouple actuated, manual reset excess temperature controller
—Electronic flame safeguard protection
—Combustion air blower with air flow safety switch
—Purge timer
—High gas pressure switch
—Low gas pressure switch
—Two pilot safety shutoff valves with leak test stations
—Two main safety shutoff valves with leak test stations (Industrial Risks
Insurers vent valve only provided on specific request)
—Valve position indicator on main safety shutoff valves
—Over 400,000 BTU/HR safety shutoff valve interlocked with purge timer
Construction
—3/16" steel plate reinforced furnace shell
—1/2" thick steel front plate
—Brushed stainless steel control panel face
—Powered vertical lift door
—Door hot side faces away from operator at all times
—Energy-saving lightweight ceramic fiber insulation reduces operating
costs
—Heavy duty ceramic hearth plates supported by firebrick piers
—Excellent temperature uniformity throughout work space
—Fast heat-up and cool-down
—1 year limited warranty
All equipment fully
assembled and individually factory tested
SPECIFICATIONS Back
to Top NOT FOR USE WITH FLAMMABLE
SOLVENTS, VAPORS OR GASES.
Model
Work Space
Outside Dimensions* (WxDxH)
Height Door Open
Door Type
Hearth Rating Lbs‡
Heat Input
Operating Characteristics†
Approx Shipping Weight
Model
Dimensions (WxDxH)
Volume Cu Ft
KW
BTU/HR
Control Accuracy
Furnace Uniformity
Rise Time
230V
460V
HD-153015
15" x 30" x 15"
3.9
37" x 53" x 63"
78"
Manual¹
230
18**
225,000
± 0.3%
±15°F
45 min
35 min
1500 lbs
HD-301530
HD-183618
18" x 36" x 18"
6.7
53" x 73" x 75"
98"
Electric
320
24
300,000
± 0.3%
±15°F
175 min
130 min
2650 lbs
HD-183618
HD-243618
24" x 36" x 18"
9
59" x 73" x 75"
98"
Electric
450
33
360,000
± 0.3%
±15°F
135 min
120 min
3000 lbs
HD-243618
HD-243624
24" x 36" x 24"
12
59" x 73" x 80"
108"
Electric
450
40
440,000
± 0.3%
±15°F
125 min
110 min
3600 lbs
HD-243624
HD-244824
24" x 48" x 24"
16
59" x 85" x 80"
108"
Electric
600
48
525,000
± 0.3%
±15°F
120 min
105 min
4100 lbs
HD-244824
HD-304830
30" x 48" x 30"
25
67" x 85" x 86"
116"
Electric
750
56
650,000
± 0.3%
±16°F
120 min
90 min
4500 lbs
HD-304830
HD-306030
30" x 60" x 30"
31
67" x 96" x 86"
116"
Electric
850
60
700,000
± 0.3%
±16°F
135 min
105 min
5100 lbs
HD-306030
HD-364836
36" x 48" x 36"
36
74" x 85" x 126"
126"
Air
950
66
750,000
± 0.3%
±18°F
140 min
100 min
5250 lbs
HD-364836
HD-366036
36" x 60" x 36"
45
74" x 96" x 126"
126"
Air
1150
73
800,000
± 0.3%
±18°F
140 min
100 min
5700 lbs
HD-366036
HD-367236
36" x 72" x 36"
54
74" x 108" x 126"
126"
Air
1350
86
950,000
± 0.3%
±18°F
140 min
95 min
6300 lbs
HD-367236
HD-484836
48" x 48" x 36"
48
86" x 85" x 126"
126"
Air
1200
78
850,000
± 0.3%
±20°F
135 min
90 min
6200 lbs
HD-484836
HD-484848
48" x 48" x 48"
64
86" x 85" x 150"
150"
Air
1400
92
1,000,000
± 0.3%
±20°F
130 min
90 min
6900 lbs
HD-484848
HD-487248
48" x 72" x 48"
96
86" x 108" x 150"
150"
Air
2000
135
1,400,000
± 0.3%
±22°F
120 min
90 min
8500 lbs
HD-487248
*All Models
—Control panel overhang 9" right
side.
Gas Models
—Combustion blower overhang 36" rear.
¹Gas spring assists operation. Construction
similar to electric door.
Heating elements located on sidewalls and roof only; 13.5 KW
**80 minute Rise Time on 230 volts.
†Accuracy
as percent of controller span. Uniformity at 100°F below maximum
temperature. Rise Time in minutes to 100°F below maximum temperature.
Tests run with empty furnace. Performance will vary with load and
application. See Bulletin TC-920 for
additional details.
‡Uniformly distributed.
Furnace shell is made of 3/16" thick steel plate reinforced with structural
steel. Doorsill constructed from firebrick to protect furnace during loading.
Ceramic hearth plates are 2" thick and supported by firebrick piers. Soft insulation
on door provides an excellent heat seal by pressing against the vestibule refractory
and the 1/2" thick steel front plate. Exterior painted with Trilite Green enamel.
Each features completely wired, side access UL
listed control panel assembled on the furnace enclosing terminals for incoming
power, temperature controllers, push buttons and pilot lights.
Electric Models
Safety devices as listed at the top of this bulletin. Heating element contactors
electrically interlocked with door to shut off power to heaters as door opens
and restore power when closed. High temperature alloy wire heating elements
supported in vacuum cast ceramic fiber. Heating elements located at sides, rear,
door, and under hearth, except as noted.
Gas Models
— 1,000 BTU natural gas at 2 psig pressure;
1" NPT inlet up to 800,000 BTU/HR;
1-1/4" NPT 850,000 to 1,000,000 BTU/HR;
1-1/2" NPT at 1,400,000 BTU/HEATER
— Other gas characteristics available
Safety devices as listed at the top of this bulletin. Automatic pre-ignition
purge period and push button electric ignition contributes to ease of operation.
Modulating gas burners fire beneath hearth from opposing sides to circulate
heated air through the work space (HD-153015 has single burner firing above load from rear). Gas burners protected with electronic flame
safety relay. Door interlock switch drives main burner to low fire when door
is opened and restores control when door is closed.
ELECTRIC DOOR
Door pivots upward above furnace, clearing front for easy loading. In the closed
position, full door weight seats door firmly against furnace face. Structural
steel pivot arms are supported at furnace sidewalls by bearings and connected
to a heavy duty electromechanical actuator. The door is controlled by a switch
at the furnace control panel.
AIR DOOR
Door rises vertically in front of the furnace hanging from heavy duty roller chain,
sprockets, shaft and pillow block bearings. In the closed position, rollers at
the sides of the door engage support brackets to force the full door weight against
the furnace face. Large diameter air cylinder rotates support shaft to lift the
door. The door is controlled by a manual air valve with supply filter, lubricator
and regulator.
ADDITIONAL
EQUIPMENT AVAILABLE Back
to Top
See Bulletin TC-960 for modifications and other
optional equipment.
Programmable
Temperature Controller, microprocessor based, digital
indicating, thermocouple actuated, in lieu of standard controller Option PTC3
Recording Thermometer,
thermocouple actuated, 24-hour, 10" diameter circular chart used in conjunction
with standard controller Option RT
Programmable Recording
Temperature Controller, microprocessor based, thermocouple actuated, digital
display, 24-hour, 10" diameter circular chart, in lieu of standard controller Option PRTC3
Digital Timing System,
incorporated into standard temperature controller, 99 hour 59 minute range,
starts timing at temperature set point and shuts down furnace at end of set
time Option DTS3
Shut Down Timer,
with continuous "hold" feature; 1, 5, 10 or 30 hour range Option SDT
Batch Timer,
for uniformly timing batch operations. Continuous alarm with door interlock;
alarm ends at end of preset time period until door is opened or timer reset;
1, 5, 10 or 30 hour range Option BT
Alloy Hearth Tray,
made of heat resisting high temperature alloy, for protecting ceramic hearth
plates from impact and heavy loading Option AH
Recirculating Fan,
water cooled fans standard, air cooled available, improves temperature uniformity
from 600°F to 1600°F, available on Model HD-304830 and larger, may reduce
heat input on electric models, not available on gas models Option RF
Inert Atmosphere
Construction, electric only, includes continuously welded shell, inert
atmosphere gas inlet and outlet, high temperature door gasket, sealed terminal
boxes, optional forced cooling systems are available at additional cost Option IAC
Inert Atmosphere
Inlet Piping, with indicating flow control and manual gas valve. Specify
atmosphere Option IAIP
UL LISTED CONTROL PANEL
